Lock-in detection system for images

图像锁定检测系统

• 批准号: 10650409
• 负责人: MINEMOTO Takumi
• 金额: $ 2.11万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10650409/
• 关键词: image detection; lock-in detection; spatial light modulator; Pockels effect; electroabsorption effect; 電界吸収効果

First the dependence of the Pockels effect in the spatial light modulator that used a BiィイD212ィエD2SiOィイD220ィエD2 single crystal (BSO-SLM) on the frequency of externally applied high ac voltage was measured. Next an image lock-in detection system was contracted with the BSO-SLM. The following characteristics of the system : selectivity of the modulation frequency and its phase in the modulation, and linearity of output signal for numbers of integration, were also measured.Using the lock-in detection system with BSO-SLM, the image modulated with an defined frequency (100 Hz) was extracted from a simple scene image that contained the image and other back ground image. Interference fringes running on an object surface with various defined speeds were also successively detected using the lock-in detection system.Providing for a lock-in system with fast response, a spatial light modulator that used a GaAs single crystal plate (GaAs-SLM) was developed. The GaAs-SLM can convert visible images to its near infrared images with a speed larger than 1000 frames/s.

首先，测量了使用 BiD212D2SiOD220D2 单晶 (BSO-SLM) 的空间光调制器中的泡克尔斯效应对外部施加的高交流电压的频率的依赖性，然后将图像锁定检测系统与 BSO-SLM 结合起来。系统具有以下特性：调制频率及其相位的选择性，以及积分数的输出信号的线性度，使用带有 BSO-SLM 的锁定检测系统，从包含图像和物体上运行的其他背景干涉条纹的简单场景图像中提取以定义频率 (100 Hz) 调制的图像。使用锁定检测系统也成功地检测到具有各种定义速度的表面。为了提供快速响应的锁定系统，开发了一种使用砷化镓单晶板（GaAs-SLM）的空间光调制器。 GaAs-SLM可以将可见光图像转换为其近红外图像，速度大于1000帧/秒。

项目成果

Y.Bitou: "High Speed Incoherent-to-Coherent Image Converter Using GaAs" Optics and Optoelectronics. 1. 80-83 (1998)

Y.Bitou：“使用砷化镓的高速非相干到相干图像转换器”光学和光电子学。

Y.Bitou, Y.Osugi, and T.Minemoto: "High-speed and high-contrast incoherent-to-coherent converter that uses a GaAs single crystal"Opt. Eng.. 38-4. 710-716 (1999)

Y.Bitou、Y.Osugi 和 T.Minemoto：“使用 GaAs 单晶的高速、高对比度非相干到相干转换器”Opt。

Youichi Bitou: "High-speed and high-contrast incoherent-to-coherent converter that uses a GaAs single crystal"Optical Engineering. 38. 710-716 (1999)

Youichi Bitou：“使用 GaAs 单晶的高速、高对比度非相干到相干转换器”光学工程。

Y.Bitou and T.Minemoto: "High-contrast spatial light modulator by use of the electroabsorption and electro-optic effects in a GaAs single crystal"Appl. Opt.. 37-20. 4347-4356 (1998)

Y.Bitou 和 T.Minemoto：“利用 GaAs 单晶中的电吸收和电光效应的高对比度空间光调制器”Appl。

Youichi Bitou: "High speed incoherent-to coherent image converter using GaAs"Optics and Optoelectronics. 1. 80-83 (1998)

Youichi Bitou：“使用砷化镓的高速非相干到相干图像转换器”光学和光电子学。